In a first order reaction,the initial conc.of the reactant was M/10 .After "8" minutes "20" seconds the conc.becomes M/100 . What is the rate constant?

In a first order reaction the concentration of the reactant is reduced to one-fourth of its initial value in 50 seconds. Cacluate the rate constant the reaction

A first-order reaction was started with a decimolar solution of the reactant, 8 minutes and 20 seconds later its concentration was found to M//100 . So the rate of the raction is

In a first order reaction A to B, if k is rate constant and initial concentration of the reactant A is 2 M then the half life of the reaction is:

Calculating fraction : The rate constant of a first order reaction is 0.0231 min^(-1) . What fraction of the reactant remains after 70 minuts ? Strategy : If 'f' is the reaction of the reactant reacting after 70 minutes, then the fraction of the reactant remaining after 70 minutes will be 1 - f.